Effect of Vanadium Content on the Properties of 40Cr Die Steel

Various contents of vanadium were added to 40 Cr die steel,and the microstructure,impact property at room temperature and wear resistance of the die steels were tested,compared and analyzed.The results show that proper addition of vanadium can improve the microstructure,increase impact absorption energy,reduce wear volume,improve impact property and wear resistance of 40 Cr die steel samples.Compared with the steel without vanadium,the impact absorption energy is separately increased by 6.25%,16.67% and 12.5%,and the wear volume is respectively decreased by 12.5%,26.92% and 24.04% for the sample with 0.25%,0.5% and 0.75% of vanadium,respectively.When the vanadium content is 0.5%,the impact absorption energy of the sample is the largest,and the wear volume is the smallest,with the best impact performance and wear resistance.The vanadium content in 40 Cr die steel is optimized at 0.5%.